SoftwareRendered bool

include/ReWindow/types/Window.h

@@ -323,6 +323,10 @@ public:
     /// This function instructs the operating system to create the actual window, and give it to us to control.
     /// Calling this function, therefore, creates the real 'window' object on the operating system.
     [[nodiscard]] virtual bool Open() = 0;
+
+    /// @returns True if we are definitely running on a software renderer.
+    /// @note For some APIs this isn't typically possible.
+    [[nodiscard]] virtual bool SoftwareRendered() { return false; }
 };
 
 // TODO in the event that we can't find OpenGL or the Open() fails, have a way to say so without throwing an exception.
@@ -334,6 +338,7 @@ public:
     void SetVsyncEnabled(bool state) override;
     std::string GetGraphicsDriverVendor() override;
     [[nodiscard]] bool Open() override;
+    [[nodiscard]] bool SoftwareRendered() override;
 public:
     OpenGLWindow(const std::string& title, int width, int height, uint8_t gl_major, uint8_t gl_minor);
 };

src/platform/linux/OpenGLWindow.cpp

@@ -192,3 +192,12 @@ OpenGLWindow::OpenGLWindow(const std::string& title, int width, int height, uint
     OpenGL::glXChooseVisual = (OpenGL::glXChooseVisual_t) dlsym(glx_lib, "glXChooseVisual");
     OpenGL::constructor_success = true;
 }
+
+bool OpenGLWindow::SoftwareRendered() {
+    std::string renderer((const char*) OpenGL::glGetString(GL_RENDERER));
+    if (renderer.find("llvmpipe"))
+        return true;
+    if (renderer.find("softpipe"))
+        return true;
+    return false;
+}

src/platform/windows/OpenGLWindow.cpp

@@ -99,6 +99,19 @@ void OpenGLWindow::SetVsyncEnabled(bool b) {
         wglSwapIntervalEXT(b ? 1 : 0);
 }
 
+bool OpenGLWindow::SoftwareRendered() {
+    std::string renderer(reinterpret_cast<const char*>(glGetString(GL_RENDERER)));
+    if (renderer.find("llvmpipe"))
+        return true;
+    if (renderer.find("softpipe"))
+        return true;
+    if (renderer.find("GDI Generic"))
+        return true;
+    if (GetGraphicsDriverVendor().find("Mesa"))
+        return true;
+    return false;
+}
+
 OpenGLWindow::OpenGLWindow(const std::string& title, int width, int height, uint8_t gl_major, uint8_t gl_minor)
 : gl_major(gl_major), gl_minor(gl_minor), RWindow(title, width, height) {
     gl_lib = LoadLibrary("opengl32.dll");